The City of Riverside is sending requests for proposal and qualifications to engineering firms. Businesses that have offices within 50 and 100 miles will receive the document. City Administrator Rusty Rogerson says their day to day engineering needs have been handled by Hart-Frederick Consultants of Tiffin for the past 25 years. Rogerson says the city council agreed at Monday’s meeting that it’s a good idea to go out into the marketplace to determine what their options are.